<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1,user-scalable=no">
</head>
<body>
<div class="content_body">
    
</div>
<script>
    // let a=function () {
    //     // console.log("aaa")
    //     document.write("aaaaaqqqq")
    // }()
    // a()

    (function test() {
        document.write("AAAqwqqqq")
    }())
</script>
</body>
</html>